Fluke BT520 Configuration guide

Manual Supplement
© 2014-2015 Fluke Corporation. All rights reserved. 

Manual Title: BT520 Users Supplement Issue: 2
Print Date: May 2014 Issue Date: 3/15
Revision/Date: Page Count: 7
This supplement contains information necessary to ensure the accuracy of
the above manual.

BT520 Users Manual Supplement
3/15 1
Change #1
On page 1-3, remove item 5 from the Standard Equipment table.
On page 1-4, remove item 5 from the Standard Equipment figure.
On page 4-5, following Figure 4-3, add:
Note
Probe tips are not covered under Warranty.
On page 4-5, remove Use the Probe Light section and figure.
On page 7-7, remove item 4 and add item 21, in the Parts and Accessories table.
BT-500 Probe-Tip, Replacement
Probe tips with covers 4561297 10
Change #2, 124
On pages 3-7, 3-8, 3-9, 3-10 and 3-11, replace with:
Make Measurements
Test Battery Internal Resistance and Voltage or Strap Resistance
The Product can simultaneously test the internal resistance and voltage of a battery.
This helps you to understand the overall state of the battery health. The Product can also test strap
resistance since upward changes could be caused by corrosion or loose connections.

Manual Supplement BT520 Users
2 3/15
To test battery internal resistance and voltage or strap resistance, turn the rotary switch to mΩ. See
Figure 3-1.
hsz018.eps
Figure 3-1. Test Battery Internal Resistance and Voltage or Strap Resistance
AB CD
AB CD
Strap Resistance
Internal Resistance and Voltage

BT520 Users Manual Supplement
3/15 3
Battery Test Probes
To connect test probes to the battery pole:
1. Use the inner tip of the test probe to touch the target surface.
2. Push the test lead to set-back the inner tip, until both the inner tip and the outer tip are fully
connected to the target surface. This will ensure a proper 4-wire connection to the battery
terminal.
Note
Stable and correct readings are shown only when both the inner tip and the outer
tip of the test probe are fully connected to the battery posts. To get more
accurate battery internal resistance reading, do not connect the test probes to
screws. See Figure 3-2.
Examine for open fuse before mΩmeasurement by connecting the outer tips of
both probes. If the mΩreading changes from OL to dashes and then backs to
OL, the fuse is good. If mΩreading remains as OL, the fuse is open and needs a
replacement.
In this function, the voltage between the positive and negative poles of a battery
must be < 60 V. A voltage >60 V causes the fuse to open.
hsz008.eps
Figure 3-2 Connect Test Probe to Battery
Small Hole Cylinder Screw Cube
Circle StripCylinder Clamp

Manual Supplement BT520 Users
4 3/15
View Test Readings on the Screen
This is a typical display of battery test in Meter mode.
This is a typical display of battery test in Sequence mode:
Battery number: Indicates the number of the battery that has been tested.
Progress bar: The progress bar is generated according to the total number of batteries in the profile.
Each cell corresponds to one battery. An empty cell indicates the corresponding battery is not tested
yet. A full cell indicates the corresponding battery has been tested and the readings have been
saved. A cross mark in a full cell indicates that the threshold function is enabled.
Cursors: Use and to move the cursors. The number of the currently tested battery changes
accordingly. When the cursors are positioned on a full cell, the corresponding reading of that battery
will be shown under the progress bar.
Average readings: After two or more sets of test readings are saved, the Product shows the
average readings, including average resistance and average voltage.
Tip: If the test readings of a battery are significantly different from the average readings, it could
indicate the battery health has been compromised.
Measure Strap resistance in sequence mode
A strap string is created right behind battery string automatically in the same profile. The strap
number equals to battery number. Push the Strap softkey to switch to strap string test. The display
shows to indicate strap string. Push Battery softkey to switch back to battery string test.

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520 Users
15
e
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ilter for batt
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the More s
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rement is 3
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cannot be c
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t
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ry resistan
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e
current re
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current seri
a
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t correspo
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ent
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st lead is n
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n
ds to the c
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save new
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impact on
t
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duce the i
m
ment, in Me
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key. The di
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ult range fo
r
to cycle t
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ry voltage
m
l
tage and ti
m
the Save s
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o
t installed,
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t
he battery r
m
pact of ac r
ter mode, p
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s
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M
anual Suppl
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o
ftkey to sa
v
1. The test
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.
g
s for this b
a
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sh LO soft
k
the LO ico
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ment
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ent
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t is
v
e
a
ttery.
k
ey,
n
.

Manual Supplement BT520 Users
6 3/15
Set Measurement Thresholds
The Product lets you define upper and lower measurement thresholds or tolerance ranges. These
defined threshold values are then compared to the measured values to automatically identify and
prompt the user with a PASS, FAIL or WARN indicator of battery out of tolerance conditions.
The threshold function is disabled by default. You can set up to 10 set of thresholds and select one
threshold as needed.
To set and select measurement thresholds:
1. On the measurement screen, push the More softkey and Threshold softkey to open the Select
Threshold menu.
2. Use and to select one threshold set out of ten.
3. Use and L to highlight the value to be edited among Voltage lower, Reference, Warning,
Fail, Low limit, and Notes.
4. Edit the selected field.
a. Use the – and + softkeys to change the values for Warning and Fail.
b. For other fields, push the Edit softkey, use the arrow keys to edit the value, and then push the
Confirm softkey to save the value.
5. Once all threshold values are correct, push the Confirm softkey on the save the threshold set.
The threshold set is applied and the T-X (X stands for value of No.) icon and the corresponding
PASS/WARN/FAIL indication shows on the display.
To disable measurement thresholds:

BT520 Users Manual Supplement
3/15 7
1. On the measurement screen, push the Threshold softkey to open the Select Threshold menu.
The value of No. is already highlighted.
2. Use to set No. to ---.
3. Push the Confirm softkey.
The T-X icon no longer shows on the display.